The top two rings seal the piston to the cylinder wall and prevent _____ from entering the crankcase.
A. air-fuel mixture
B. combustion gases
C. excessive fuel
D. excessive oil
查看答案
The connecting rod is attached to the piston by the _______
A. piston rod
B. piston pin
C. cap bolts
D. cap bearing
The bottom ring prevents excessive oil from entering the combustion chamber from the______ .
A. oil pan
B. crankcase
C. fuel tank
D. water pump
The flywheel is bolted to the _____on the rear end of the crankshaft.
A. tail
B. central
C. flange
D. top
In the standard engine, each cylinder has ______.
A. four valves
B. two valves
C. one valve
D. three valves
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